#include<iostream>
#include<stdio.h>
#include<conio.h>
using namespace std;
class CRectangle{
	int width;
	int height;
public:
	CRectangle();
	CRectangle(int,int);
	int area();
};
CRectangle::CRectangle(){
	width=5;
	height=5;
}
CRectangle::CRectangle(int a,int b){
	width=a;
	height=b;
}
int CRectangle::area(){
	return (width*height);
}
int main(){
	CRectangle recta(3,4);
	CRectangle rectb;
	cout<<"area a:"<<recta.area();
	cout<<"\narea b:"<<rectb.area();
	getch();
}